System won't boot up properly

[amature]

I had a virus and made the common mistake of deleting an "exe" file. Now when I boot up it won't load properly unless I first log off. After I log off it will boot up fine. I did the scan disk thing but it didn't show any problems. How do I find out what file I deleted and how can I get it back? Greatly appreciate this.

 

[toretto]

run your system file checker

sfc.exe -scannow

 

[amature]

Thanks Toretto, that did the job. It boots up fine now!